class Person(object):
    mouth=1
    def eat(self,speed):
        self.mouth=1
        print(f"eat...eat...{speed}.....")

    @classmethod #类方法
    def speak(cls):
       # cls.mouth = 2
      print(cls.mouth)

    @staticmethod
    def test():
      print("静态方法")

Person1=Person()
print(Person1.mouth)
Person1.eat(100)    #添加参数
print(Person.mouth)
Person1.eyes=2      #动态添加新的属性
print(Person1.eyes)
